Friction draft-riggin.



1N0. 742,320. I PATBNTED 0m. 27, 1903.

. J. (1. ,HERRMANN. FRICTION DRAFT RIGGING.

APPLICATION FILED JULY 9; 1903. N0 MODEL. 2 SHEETS-SHEET 2.

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Patented October 27, 1903.

PATENT OFFICE.

JULIUS U. HERRMANN, OF ALLEGHENY, PENNSYLVANIA.

FRICTION DRAFT-RIGGING.

SPECIFICATION forming part of Letters Patent No. 742,220, dated October2'7, 1903.

Application filed -Inly 9,1903. Serial No. 164,911 (No model.)

, T a/ZZ whom it mayportacr-nr Be it knownthat I,-J LIU s O. HERRMANN, aresident of Allegheny, in the county ofAlleghenyand State ofPennsylvania, have invented a new and useful Improvement in FrictionDraft-Rigging, and I do hereby declare the following to be afull, clear,and exact description thereof.

My invention relates to One of the objects of my invention is to providea friction draft-rigging in which the main friction member may beconnected directly to the coupler-bar, so as to dispense with anyintermediate connections.

friction draft-rig Another object of my invention is to pro-' vide forthe holding of all the parts of the friction-gear within the mainfriction member, so that the parts are all held together within the mainmember bythe tension of the springs and ready to be applied to thecoupler. t 7,

To these ends my invention comprises, generally stated', a main frictionmember consisting of a suitable casting having angular seats or recessesat each end thereof, triangular-shaped followers adapted to enter saidrecesses, the outer ends of said block's bearing against the stationarysupports on the draft-rigging frame, and a'wedge-shaped friction-blockinterposed between; the triangular followers, together with a springintert the forward end of the'fricti'on member 8 are posed between saidwedge-block and a suitable abutment.

My invention comprises other features, all .of which will be hereinafterfully set forth and claimed.

To enable others skilled in the art to make and use my invention, I willdescribe the same more fully, referring to the accompanying drawings, inwhich-'- Figure 1 is a plan view of a portion of a draft-rigging framewith my improved draftrigging applied thereto. Fig. 2 is a sectionalside elevation. Fig. 3 is across-section on the line 3 3,'Fig. 2. .Fig.4 is a cross-section on line 4 4, Fig. 2. Fig.'5 is an end view of oneof the friction-followers, and Fig. 6 is a top view of the same.

Like numerals indicate like parts in each of the figures.

In the drawings, the numeral 2 designates any suitable draft-riggingframe, and passing through the opening 3 in said draft-rigging frame isa suitable coupler 4, having the inwardly-projecting bar or tailpiece 5.This tailpiece 5 has the enlargement 6,which enters the seat 7 in thecasting 8, which forms the main friction member of my improveddraft-rigging. This friction member 8 is formed of suitable metalprovided with strengtheningribs 9, and atits forward end the projectingportion 10 forms the seat-7 for the enlargement 6 of the coupler. Theshoulders 11 act to prevent the withdrawal of the couplerbar, and boltsor rivets 12 pass through the casting and the bar in order to hold saidbar securely in positionand relieve the outward strain when the frictionmember is operated.

The friction member 8 is closed at its ends 13 14, but is open at itssides except the mid portion, where it is strengthened by the ring orenlargement l5. fThe ends of the friction member 8' are enlarged to formthe angular recesseslt, formed by the inclined upper and lower portions17 of thecasting, together with the end walls of same. In order tostrengthen the corners of the frictionmember 8, said friction'member isprovided with the lugs 18, cast therein, which increase thethickness ofthe metal at the corner, and thus give additional strength. v

Fitting within the angular recesses 16 at the friction-followers 19.Thesefriction-followers,;as indicated in Figs. 5 and 6, are triangularin cross-section, and when they are inserted within the recesses 16 thegrooves 20 in said followers are adapted to engage the lugs 18 at thecorners ofthe friction member,

while the outer ends 21 of said followers bear against the shoulders orstops 22 on the draftrigging frame. When these. friction-followers arein position, the sides 23 thereof bear against the inclined portions 17of the friction member 8, while the sides 24 of said follower bearagainst the end plate 14. A friotionwedge 25 is interposed between thefaces 26 of the friction-followers, and in order to provide against thelateral movement of the wedge-block 25 the followers 19 are providedwith ribs27, with which the wedge-block 25 engages.

I oo

Interposed between the wedge-block 26 and tion member, a friction-blockinterposed bea sliding plate 28 within the main friction member 8 arethe springs 29 30. On the 0pposite side of the plate 28 are likesprings, which bear against a like wedge-block 25, which in turn is infrictional contact with like followers 19, all arranged and constructedas hereinbefore described with reference to the opposite end of the mainfriction memher 8. By the above construction it will be apparent thatthe action of the springs tends to force the wedge-block 25 in adirection to force apart the followers, said followers being heldagainst forward movement by the steps 22. The friction-blocks areinserted in the main friction member in the following manner: The rearfriction-followers are first inserted from the open sides of the mainfriction memberand introduced into the recesses. The wedge-block is theninserted and the springs bearing against same. The movable plate 28 isthen inserted and the forward springs. By compressing the springs theforward friction-followers and wedge-block may be inserted, whereuponthe springs may be released and the parts all held securely in place, sothat in the handling of the friction member the parts will not drop out,and by simply attaching the friction member 8 to the coupler the deviceis ready for use.

When my improved draft-rigging is in operation and the shock comesagainst the same so as to force back the main friction member 8, saidmember will recede, and the inclined friction-faces 17 will travel alongthe corresponding face 23 of the rear followers, and as said followersare held from horizontal movement by the stop 22 the main frictionmember forces the followers toward each other, thus forcing back theinterposed wedge-block 25 and compressing the rear spring 29 and 30. Thepoints of friction secured by the above construction are that of theinclined faces 17 of the friction member 8 against the faces 23 of thefollowers, that of the ends of the friction-followers on the stop 22,and that of the friction-followers bearing on the inclined faces of thewedge 25. In case the force is applied to move the friction member Sinthe opposite direction or in case of a pull on the draft-bar thefriction member 8 will move inthe opposite direction; but the sameaction will take place, as all the parts are combined and arranged inthe same manner.

By the above construction I obtain a very efiicient draft-rigging inwhich the frictional contact of the parts is of such a character as torender the device very efficient in taking up of jolts or jars andrelieving the strain due to such action.

IVhat I claim is- 1. In friction draft-rigging, the combination of amain friction member connected to the coupler, friction -followerswithin said friction member, means for preventing the movement of saidfollowers with said frictween said followers, and a spring acting onsaid block.

2. In friction draft-rigging, the combination of a main friction memberhaving angular seats or recesses, friction-followers engaging saidrecesses, means for preventing the movement of said followers with saidmain friction member, a friction-block interposed between saidfollowers, and a spring acting on said block.

3. In friction draft-rigging, the combination of a main friction memberhaving an end face and inwardly-sloping faces forming in conjunctionwith said end face angular re cesses,triangular friction-followers insaid recesses,a wed ge-block interposed between said followers, meansfor preventing the movement of said followers with said main frictionmember, and a spring acting on said wedgeblock.

at. In friction draft-rigging, the combination of a main friction memberhaving an end face and inwardly-sloping faces forming in conjunctionwith said end face angular recesses, friction-followers within saidrecesses, the ends of said followers projecting beyond said frictionmember and engaging stops on the draft-rigging frame, a friction-blockinterposed between said followers, and a spring acting on said block.

5. In friction draft-rigging, the combina tion of a main friction memberhaving angular seats at each end thereof, triangular friction-followersin said seats,means for preventing the movement of said followers withsaid friction member, friction wedge-blocks interposed between saidfollowers, and springs interposed between said wedge-blocks and asliding abutment in said main friction member.

6. In friction draft-rigging, the combination of a main friction memberhaving angular seats formed therein, reinforcing-lugs in said seats,triangular friction-followers entering said seats and having recessesformed therein with which said lugs engage, a friction wedge-blockinterposed between said followers, means for preventing the movement ofsaid followers with said friction member, and a spring acting on saidwedge-block.

7. In friction draft-rigging, the combination of a main friction membercomprising an open-sided oblong body enlarged at its ends to formangular seats, triangular friction-followers in said seats, means forpreventing the movement of said followers with said friction member,friction wedge-blocks interposed between said followers, and springsinterposed between said wedge-blocks and a sliding plate in saidfriction member.

8. In friction draft-rigging, the combination of a main friction memberadapted to be connected to the coupler, friction-followers within saidfriction member, means for preventing the movement of said followerswith said friction member, and a spring arranged to hold said followersagainst the main friction member.

9. In friction draft-rigging, the combination of a main friction memberhaving angular faces, friction followers engaging said faces, means forpreventing the movement of said followers with said main frictionmemher, and yielding means arranged to hold said followers against theangular faces of said main friction member.

10. In friction draft-rigging, the combination of a main friction memberhaving angular faces at each end thereof, friction-follow ers bearingagainst said faces, means for preventing the movement of said followerswith said main friction member, friction wedge-' JULIUS O. HERRMANN.Witnesses:

G. O. RAYMOND, ROBERT C. TOTTEN.

